- Apr 26, 2009
- 419
Jason I would be interested in a rough chart. I do understand that it would be very complex to figure out as every pool's plumbing is different but how accurate does one need to be? A rough chart would be close enough plus or minus a deviation, am I correct? I am sure mas985 would be able to put together something :-DJasonLion said:We would need way more information to guess at that. The flow rate at any given speed depends on the "dynamic head", essentially the water resistance, of you your plumbing system. That in turn depend on almost every detail of how your pool is plumbed (and can be complex to figure out ).
mas985 said:I put together this spreadsheet some time ago. It uses the energy readout of the pump and RPM levels to determine GPM. There is a direct relationship between the three for the Intelliflo. If you know two, you can determine the third.
mas985 said:No Problem.
For the method I used in the spreadsheet, knowledge of head is not required. You only need to know RPM and Watts both of which the Intelliflo displays. Funny thing is that it would have been so easy for Pentair to also display GPM as they do in the VF. They could have just disabled the capability to set GPM for the VS.
PoolGuyNJ said:That pump curve is light. According to my books, the VS-3050 @ 55 feet of head is pushing over 140 GPM. The need for big pipes is apparent.At 85 ft, it's about 85 GPM. Both are at 3450 rpm and 3000 watts.
@ 300 watts @ 12 ft. of head it's 40 GPM
Remember, head loss drops in a given pipe as velocity drops due to less friction.
Scott